yes, Iwindow key with the default setting(nil) doesn't work as expected, it should be passed to windows.<br><div><div><br></div><div><br></div><div style="font-size: 12px;font-family: Arial Narrow;padding:2px 0 2px 0;">------------------&nbsp;原始邮件&nbsp;------------------</div><div style="font-size: 12px;background:#efefef;padding:8px;"><div><b>发件人:</b>&nbsp;"Eli Zaretskii"&lt;eliz@gnu.org&gt;;</div><div><b>发送时间:</b>&nbsp;2019年9月25日(星期三) 凌晨0:39</div><div><b>收件人:</b>&nbsp;"Juanma Barranquero"&lt;lekktu@gmail.com&gt;;<wbr></div><div><b>抄送:</b>&nbsp;"Albert"&lt;georgealbert@qq.com&gt;;"37495"&lt;37495@debbugs.gnu.org&gt;;<wbr></div><div><b>主题:</b>&nbsp;Re: bug#37495: 27.0.50; lwindow doesn't pass to system</div></div><div><br></div>&gt; From: Juanma Barranquero &lt;lekktu@gmail.com&gt;<br>&gt; Date: Tue, 24 Sep 2019 15:50:35 +0200<br>&gt; Cc: 37495 &lt;37495@debbugs.gnu.org&gt;<br>&gt; <br>&gt; I see two problems in your image, but none of them are related to being unable to redefine lwindow.<br><br>I thought the OP said that lwindow doesn't work for him _without_<br>redefining it.&nbsp; IOW, the default action of the key is somehow<br>intercepted by Emacs when it shouldn't be.<br><br>Am I confused?<br></div>